FESB16ATHE3_A/I Equivalent & Substitute Parts

Part Overview

The FESB16ATHE3_A/I is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This device is rated for 50 V DC reverse voltage with 16 A average rectified current in a surface mount TO-263AB (D2PAK) package. The part is designated as Last Time Buy, indicating discontinued production status. Identification of equivalent and substitute parts is necessary to ensure continued design support and procurement availability for applications currently utilizing this component.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	16	A
Voltage - Forward (Vf) (Max) @ If	975 mV @ 16 A	mV
Reverse Recovery Time (trr)	35	ns
Current - Reverse Leakage @ Vr	10	µA @ 50 V
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-65°C ~ 150°C	°C
Grade	Automotive	—
Qualification	AEC-Q101	—
Technology	Standard	—

Substitute Part Grouping Explanation

Substitution of the FESB16ATHE3_A/I is determined by the following critical parameters:

Mechanical Compatibility:

Package type: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Mounting type: Surface Mount

Electrical Compatibility:

Voltage rating must equal or exceed 50 V DC reverse voltage
Current rating must equal or exceed 16 A average rectified current
Forward voltage drop characteristics must be compatible with circuit design
Reverse recovery time must support the application switching frequency

Quality & Compliance:

Automotive grade qualification (AEC-Q101)
RoHS3 compliance
Operating temperature range: -65°C ~ 150°C

Two substitute parts are identified based on these criteria:

FESB16DTHM3/I (Vishay) — Higher voltage rating (200 V) with identical current and package specifications, maintaining full parameter compatibility and automotive qualification.
STPS20L60CGY-TR (STMicroelectronics) — Schottky diode array with different electrical characteristics (60 V, 10 A per diode, lower forward voltage) in identical package, suitable for applications where Schottky performance is acceptable.

Parameter Comparison

Parameter	FESB16ATHE3_A/I	FESB16DTHM3/I	STPS20L60CGY-TR
Manufacturer	Vishay General Semiconductor	Vishay General Semiconductor	STMicroelectronics
Category	Diodes, Rectifiers	Diodes, Rectifiers	Diodes, Rectifiers
Voltage - DC Reverse (Vr) (Max)	50 V	200 V	60 V
Current - Average Rectified (Io)	16 A	16 A	10 A (per diode)
Voltage - Forward (Vf) (Max) @ If	975 mV @ 16 A	975 mV @ 16 A	600 mV @ 10 A
Reverse Recovery Time (trr)	35 ns	35 ns	≤ 500 ns
Current - Reverse Leakage @ Vr	10 µA @ 50 V	10 µA @ 200 V	350 µA @ 60 V
Technology	Standard	Standard	Schottky
Diode Configuration	Single	Single	1 Pair Common Cathode
Package / Case	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-65°C ~ 150°C	-65°C ~ 150°C	-40°C ~ 175°C
Grade	Automotive	Automotive	Automotive
Qualification	AEC-Q101	AEC-Q101	AEC-Q101
Product Status	Last Time Buy	Active	Active
RoHS Status	ROHS3 Compliant	Not specified	ROHS3 Compliant

Engineering Selection Recommendations

FESB16DTHM3/I Selection Criteria:

The FESB16DTHM3/I is the primary substitute for applications requiring direct functional replacement. This part maintains identical current rating (16 A), forward voltage characteristics (975 mV @ 16 A), and reverse recovery time (35 ns). The elevated voltage rating (200 V vs. 50 V) provides additional design margin without performance degradation. Both parts share identical automotive qualification (AEC-Q101), operating temperature range (-65°C ~ 150°C), and package specifications. The FESB16DTHM3/I is in Active product status with higher inventory availability (985 Pcs), making it the preferred direct replacement.

STPS20L60CGY-TR Selection Criteria:

The STPS20L60CGY-TR is suitable for applications where Schottky diode characteristics are acceptable. This part offers lower forward voltage drop (600 mV @ 10 A) and extended upper operating temperature (175°C vs. 150°C). However, the current rating per diode is reduced to 10 A, and the diode configuration is a common cathode pair rather than a single diode. The reverse leakage current is significantly higher (350 µA @ 60 V vs. 10 µA @ 50 V). Selection of this part requires circuit-level analysis to confirm compatibility with reduced current capacity and altered electrical characteristics. Both parts maintain AEC-Q101 automotive qualification and RoHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can FESB16DTHM3/I be used as a direct drop-in replacement for FESB16ATHE3_A/I?

A: Yes. The FESB16DTHM3/I is a direct functional replacement. Both parts share identical current rating (16 A), forward voltage (975 mV @ 16 A), reverse recovery time (35 ns), package type (TO-263AB D2PAK), and automotive qualification (AEC-Q101). The higher voltage rating (200 V vs. 50 V) does not prevent substitution and provides additional design margin.

Q: What are the limitations of using STPS20L60CGY-TR as a substitute?

A: The STPS20L60CGY-TR has three significant differences: (1) Current rating is 10 A per diode versus 16 A for the original part, (2) Diode configuration is a common cathode pair rather than a single diode, requiring different circuit integration, and (3) Reverse leakage current is 350 µA at 60 V versus 10 µA at 50 V. Applications must be evaluated to confirm these characteristics are acceptable.

Q: Are all substitute parts automotive qualified?

A: Yes. Both FESB16DTHM3/I and STPS20L60CGY-TR carry AEC-Q101 automotive qualification and are suitable for automotive applications.

Q: What is the package compatibility between these parts?

A: All three parts (FESB16ATHE3_A/I, FESB16DTHM3/I, and STPS20L60CGY-TR) use the TO-263-3, D2PAK (2 Leads + Tab), TO-263AB package. PCB footprints and mounting procedures are identical.

Q: Why is the FESB16ATHE3_A/I marked as Last Time Buy?

A: Last Time Buy status indicates the manufacturer has discontinued production. Existing inventory is available for final orders, but long-term availability is not guaranteed. Transition to an active substitute part is recommended for new designs or long-term production requirements.

Q: What is the difference between Standard and Schottky diode technology?

A: Standard rectifier diodes (FESB16ATHE3_A/I and FESB16DTHM3/I) use p-n junction technology with higher forward voltage drop and lower reverse leakage. Schottky diodes (STPS20L60CGY-TR) use metal-semiconductor junctions with lower forward voltage drop but higher reverse leakage current. Technology selection depends on circuit requirements for power dissipation and leakage tolerance.

Q: Can STPS20L60CGY-TR be used in a single-diode application?

A: The STPS20L60CGY-TR is configured as a diode pair with common cathode. While it can be used in single-diode applications by utilizing only one diode of the pair, this approach results in unused silicon and may not be optimal for cost or thermal management. Direct single-diode substitutes (FESB16DTHM3/I) are preferred for single-diode circuit topologies.

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